The aim was to evaluate whether pop hole width is a factor influencing the number of laying hens on the range. Eight groups of 256 birds each were kept in 8 compartments in a deep litter system. Hens could leave each compartment through two equally-sized pop holes arranged evenly along the side of each compartment. Pop hole dimensions were varied every second week in each compartment in a random order from 30, 60, 90, 120 up to 150 x 30 cm (width x height). Range per hen (10 m(2)) were provided. The number of laying hens on range was counted hourly from 07:00 to 20:00 h. Pop hole width did not significantly influence the number of laying hens on the range. Our findings show that, within the limits of the dimensions investigated, other factors are more important than pop hole dimensions.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1080/00071660600610591 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Influence of Machining Parameters on the Dimensional Accuracy of Drilled Holes in Engineering Plastics.
Polymers (Basel)
May 2024
Department of Engineering and Technology Management, Faculty of Engineering, Northern University Centre of Baia Mare, Technical University of Cluj-Napoca, 62A, Victor Babes Street, 430083 Baia Mare, Romania.
This paper explores the interaction between cutting parameters and the geometric accuracy of machined holes in a variety of engineering plastics, with the aim of improving manufacturing processes in the plastic processing industry. In the context of fast and precise manufacturing technology, the accuracy of drilled holes in polymers is of paramount importance, given their essential role in the assembly and functionality of finished parts. The objective of this research was to determine the influence of cutting speed and feed rate on the diameter and cylindricity of machined holes in six diverse types of plastics using a multilevel factorial design for analysis.
View Article and Find Full Text PDFGleaning Euglenozoa-specific DNA polymerases in public single-cell transcriptome data.
Protist
December 2023
Graduate School of Life and Environmental Sciences, University of Tsukuba, Japan; Center for Computational Sciences, University of Tsukuba, Japan. Electronic address:
Multiple genes encoding family A DNA polymerases (famA DNAPs), which are evolutionary relatives of DNA polymerase I (PolI) in bacteria and phages, have been found in eukaryotic genomes, and many of these proteins are used mainly in organelles. Among members of the phylum Euglenozoa, distinct types of famA DNAP, PolIA, PolIBCD+, POP, and eugPolA, have been found. It is intriguing how the suite of famA DNAPs had been established during the evolution of Euglenozoa, but the DNAP data have not been sampled from the taxa that sufficiently represent the diversity of this phylum.
View Article and Find Full Text PDFTweaking Photo CO Reduction by Altering Lewis Acidic Sites in Metalated-Porous Organic Polymer for Adjustable H /CO Ratio in Syngas Production.
Angew Chem Int Ed Engl
December 2023
New Chemistry Unit and School of Advanced Materials, Jawaharlal Nehru Centre forAdvanced Scientific Research, Jakkur, Bangalore-560064, India.
Herein, we have specifically designed two metalated porous organic polymers (Zn-POP and Co-POP) for syngas (CO+H ) production from gaseous CO . The variable H /CO ratio of syngas with the highest efficiency was produced in water medium (without an organic hole scavenger and photosensitizer) by utilizing the basic principle of Lewis acid/base chemistry. Also, we observed the formation of entirely different major products during photocatalytic CO reduction and water splitting with the help of the two catalysts, where CO (145.
View Article and Find Full Text PDFUV-to-NIR Harvesting Conjugated Porous Polymer Nanocomposite: Upconversion and Plasmon Expedited Thioether Photooxidation.
Angew Chem Int Ed Engl
December 2023
Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, 462066, Madhya Pradesh, India.
Photocatalysts capable of harvesting a broad range of the solar spectrum are essential for sustainable chemical transformations and environmental remediation. Herein, we have integrated NIR-absorbing upconversion nanoparticles (UCNP) with UV-Vis absorbing conjugated porous organic polymer (POP) through the in situ multicomponent C-C coupling to fabricate a UC-POP nanocomposite. The light-harvesting ability of UC-POP is further augmented by loading plasmonic gold nanoparticles (AuNP) into UC-POP.
View Article and Find Full Text PDFVisual access to an outdoor range early in life, but not environmental complexity, increases meat chicken ranging behavior.
Poult Sci
December 2023
Institute of Animal Welfare Science, University of Veterinary Medicine, Vienna, A-1210, Austria.
Not all chickens access an outdoor range when the opportunity is provided. This may be related to the abrupt change in environments from the stable rearing conditions to the complexity of the outdoor range. We aimed to prepare chickens to range by increasing the complexity of the indoor environment early in life with the intention to encourage range use.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!